This is a python work. Works given below applied to original image.
- Image is devided into four quadrants:
- Q1 is the original image,
- Brightness increase is applied to Q2,
- Contrast increase is applied to Q3,
- Histogram equalization is applied to Q4
- Then, Q1 and modified Q2, Q3, Q4 are merged into a single image.
- Histograms of each quadrant are shown.
- 5×5 non-linear median filter / kernel is applied to an image.
- Image is transformed to Fourier Transform, high frequency components are filtered out.
You can find the codes in the link below.